JPH10250938A - Belt traverse device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate various sorts of adjusting work in a belt traverse device. SOLUTION: In a traverse mechanism part 20 in a belt traverse device T, one gear (f) of gears (e), (f) to connect pulleys 27, 34 to an upper and a lower traverse belts 21, 22 to respectively give driving force to them to be capable of interlocking is composed to be detachable. The gear (f) is removed, a traverse guide 40 is adjusted to vertically overlap at one end part, and the gear (f) is installed. In addition, a gear (d) to transmit driving force from a speed changer mechanism part 10 to the traverse mechanism part 20 is composed in such a way that it can be installed after completion of timing adjusting work between a traverse guide position and a speed changing condition. The traverse mechanism 20 is composed to be detachable, so it can be connected to the speed changer mechanism part 10 after completion of timing adjusting work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt traverse device used for a yarn winding device and the like, and an object of the present invention is to make it possible to easily perform various adjustment operations.

[0002]

2. Description of the Related Art A winding device for winding a yarn to form a package generally includes a yarn winding mechanism and a yarn traversing device, and a driving force applied from a driving source such as a motor. Thus, the package is formed by rewinding the yarn around a paper tube or the like by the winding mechanism while reciprocating (traverse) the yarn left and right by the traverse device.

As a traverse device provided in such a winding device, for example, a belt traverse device is used. In addition, there is a means for traversing with a drum having a traverse groove, but in this case, there is a disadvantage that the twist of the yarn is changed by the traverse. On the other hand, the belt traverse device is not particularly likely to cause such a defect, and is particularly effective for rewinding a silk thread or a synthetic fiber.

[0004] By the way, as a kind of package, there is a cone or a truncated conical cone in addition to a cylindrical cheese.
In order to form a cone-wound package, it is necessary to change the traverse speed between the small diameter portion and the large diameter portion. So conventionally,
The transmission mechanism is interposed in the middle of the path for transmitting the driving force of the motor to the traverse mechanism, and the traverse speed of the yarn is set to be slower when forming the large diameter portion than when forming the small diameter portion. It has been proposed. That is, by increasing the traverse speed in the small-diameter portion and decreasing the traverse speed in the large-diameter portion, a desired cone-wound package can be obtained.

[0005]

In a winding device using a belt traverse device, when a cone winding package is formed by changing the traverse speed of the traverse device by a transmission mechanism, the following adjustment work is required.

[0006] First, the belt traverse device has a pair of upper and lower traverse belts whose movement directions are set opposite to each other, and it is necessary to adjust the transfer position of the yarn between the traverse guides provided on each traverse belt. is there. In general, in the case of a belt traverse device, the upper and lower traverse guides are set so as to overlap at both left and right ends of the traverse belt, and the delivery of the yarn is performed here.

Next, it is necessary to adjust the delivery timing between the traverse guides and the cycle of the speed change in the speed change mechanism. In other words, one end of the traverse belt where the transfer of the yarn is performed corresponds to the minimum diameter portion of the package, and the other end corresponds to the maximum diameter portion. The speed change cycle must be set so that the speed becomes maximum and the traverse speed becomes minimum at the end of the traverse belt on the maximum diameter side.

Further, on the surface of the drum which is in contact with and rotationally drives the yarn package, guide grooves for preventing traversing are provided only partially at both ends in the circumferential direction. At times, the position of the drum must be set so that the yarn is engaged with the guide groove so that the twill will not occur.

Conventionally, in each of the above adjustment operations, after the traverse device is assembled, the meshing position of the timing belt or the traverse belt for transmitting the driving force from the transmission mechanism to the traverse mechanism is changed with the pulley. I do it in the way of doing. At this time, if the adjustment operation is performed without applying tension to the belt, the timing may be shifted after the tension is applied. Therefore, in the conventional belt traverse device, the timing adjustment operation has to be performed while tension is applied to the belt, which is very difficult. Therefore, for example, after the operation is temporarily stopped for maintenance or the like, when the operation is resumed, there is a disadvantage that it takes a considerable amount of time and effort to complete each of the adjustment operations.

[0010]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention has been made to facilitate various adjustment operations in a belt traverse device. In a belt traverse device including a speed change mechanism portion to which a driving force is input from a drive source and a traverse mechanism portion connected to the speed change mechanism portion and having a set of traverse belts having different moving directions, One of a plurality of gears interposed in a path for transmitting a driving force to each of a pair of traverse belts of the traverse mechanism unit via the unit can be attached after the adjustment work is completed.

More specifically, an input pulley that applies a driving force to one of a set of traverse belts having different moving directions and another input pulley that applies a driving force to the other traverse belt can be interlocked. At least one of the plurality of gears to be connected can be attached after the operation of adjusting the yarn transfer position is completed.

Further, a gear for transmitting a driving force from the transmission mechanism to the traverse mechanism can be attached after the timing adjustment operation is completed.

Further, the traverse mechanism can be detached and connected to the transmission mechanism after the timing adjustment operation is completed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a belt traverse device T (hereinafter, referred to as a "traverse device") according to the present invention is applied to a winding device A for winding a yarn S into a package P is shown in the drawings. It will be described based on the following. FIG. 1 is a perspective view showing a schematic configuration of the embodiment, and FIG. 2 is a front view showing a schematic configuration of a traverse device T.

The winding device A comes into contact with a driving source such as a motor 2, a pulley 5 to which a driving force is transmitted from a pulley 3 connected to a driving shaft 2 a of the motor 2 via a belt 4, and a peripheral surface of a package P. And a friction drum 6 (hereinafter, simply referred to as a drum 6) in which the pulley 5 is connected to a rotating shaft 6a. Near the left and right ends of the surface of the drum 6, guide grooves 7 for preventing the yarn from falling off are provided.
It is formed in a part in the circumferential direction.

The driving force of the motor 2 is transmitted to a drum 6 via a pulley 3, a belt 4, and a pulley 5, and the drum 6 applies a rotational driving force to the package P, and the yarn is wound around the tapered paper tube Q as a core. It is configured to wind S.

The driving force of the motor 2 is controlled by a traverse device T
The mechanism transmitted to is as follows. The traverse device T includes a speed change mechanism 10 and a traverse mechanism 20 connected to the speed change mechanism 10, and the rotational driving force of the motor 2 is:
First, it is input to the transmission mechanism 10. That is, the drum 6
Gear a connected to the rotating shaft 6a, and the gear b meshing therewith
(In this example, the gears a and b are bevel gears) and the transmission mechanism 1 via a gear c coaxially connected to the gear b.
0 is transmitted to the input gear 10A. Input side gear 10A
Is rotationally driven, the output gear 10B is rotated in a predetermined speed change state by a mechanism to be described later, and the rotational driving force at which the speed is changed is changed to a gear d that meshes with the output gear 10B.
And, it is transmitted to the traverse mechanism 20 via the output pulley 17 connected coaxially with the gear d.

The traverse mechanism section 20 is for moving the traverse belts 21 and 22 each having a traverse guide 40 which is stretched vertically parallel and locks the yarn S in opposite directions. In addition to 21 and 22, timing belts 23, 24 and 2
5, the pulleys 26 to 34, and the gears e and f.

The upper traverse belt 21 has a pulley 3
The lower traverse belt 22 is stretched between the pulleys 29 and 32. Transmission mechanism 1
A timing belt 23 is stretched between the zero output pulley 17 and the input pulley 26 of the traverse mechanism 20. The timing belt 24 includes pulleys 27 and 2
8 and the timing belt 25 is connected to the pulley 3
It is stretched between 3,34.

The pulleys 26, 27 coaxially arranged and the gear e are configured to rotate integrally, and the pulleys 28, 29, 30 coaxially arranged are such that the pulleys 28, 30 are integrally rotated. However, the pulley 29 rotates freely with respect to these. Similarly, pulley 3 of coaxial arrangement
Among the pulleys 1, 32, and 33, the pulleys 32 and 33 rotate integrally, and the pulley 31 freely rotates with respect to these. The pulleys 28, 29, 30 in the coaxial arrangement are provided by bosses 41, and the pulleys 31, 32, 33 in the coaxial arrangement are provided by the bosses 4.
2, it is detachably assembled. Further, the pulley 34 and the gear f, which are arranged coaxially, rotate integrally, and the gear e and the gear f mesh with each other so as to interlock with each other.

FIG. 4 shows a schematic configuration of the traverse mechanism 20 in a plan view, and FIG.
In the drawing, tension pulleys 35 to 39 not shown are added. The tension pulley 35 is used for adjusting the tension of the timing belt 23 for transmitting the driving force from the output pulley 17 of the transmission mechanism 10 to the input pulley 26 of the traverse mechanism 20, and a tension pulley 36.
Is for adjusting the tension of the timing belt 24 stretched between the pulleys 27 and 28, the tension pulley 37 is for adjusting the tension of the timing belt 25 stretched between the pulleys 33 and 34, and the tension pulley 38 is for the upper traverse belt. The tension pulley 39 for adjusting the tension of 21,
This is for adjusting the tension of the lower traverse belt 22.

The rotational driving force output from the output pulley 17 of the transmission mechanism 10 is transmitted to the pulley 26 via the timing belt 23. The rotation of the pulley 26 and the pulley 27 coaxially integrated with the pulley 26
The timing belt 24 stretched between 7, 28 is driven. The pulley 28 includes a pulley 30 connected coaxially.
To drive the traverse belt 21 stretched between the pulleys 30 and 31 in the direction of the arrow (see FIG. 1).

On the other hand, when the pulleys 26 and 27 are driven to rotate, the gear e coaxially connected to the pulleys 26 and 27 rotates, and the gear f meshing therewith is rotated in the opposite direction. Thereby, the pulley 34 connected coaxially rotates, and the pulley 33 rotates through the timing belt 25.
As a result, the pulley 32 coaxially and integrally connected thereto rotates, and the traverse belt 22 stretched between the pulleys 29 and 32 is driven in a direction opposite to the traverse belt 21.

With this mechanism, the upper and lower traverse belts 21 and 22 circulate in opposite directions, and transfer the yarn S between the upper and lower traverse guides 40 provided on the traverse belts 21 and 22, respectively. Thus, the yarn S can be reciprocated within a predetermined range corresponding to the winding width of the package P.

Next, the structure of the speed change mechanism 10 and the speed change function thereof will be described. As shown in FIG. 5, the rotation shaft 11 of the input gear 10A and the rotation shaft 12 of the output gear 10B in the transmission mechanism 10 are configured as “staggered shafts” whose rotation centers are eccentric. That is, FIG.
As shown in the figure, the rotation shaft 11 of the input-side gear 10A and the rotation shaft 12 of the output-side gear 10B are connected to respective rotation centers r ₁ ,
with r ₂ is arranged eccentrically by a distance X, the first disk 13 provided at the tip of the rotary shaft 11 of the input side gear 10A, a second disc 14 provided at the tip of the rotary shaft 12 of the output side gear 10B. Then, the pin 15 fixed in place on the first disk 13 is movably fitted into an elongated hole 16 formed in the second disk 13 to connect the two.

With this configuration, the rotational driving force of the output gear 10A is transmitted to the output gear 10B by the pin 15 connecting the first disk 13 and the second disk 14. At this time, as shown in FIG.
Since the eccentric distance X is 3 rotation center r ₁ between the rotation center r ₂ of the second disc 14, while the first disk 13 rotates, the pin from the rotation center r ₂ of the second disk 14 1
The distance to 5 changes from moment to moment. This means that the pin 15 rotates at a constant peripheral speed while the pin 15
The rotation radius to the center of rotation r ₂ of the second disk 14 is changed from, means that the angular velocity of the second disk 14 changes. Therefore, while the first disc 13 makes one revolution at a constant speed, the second disc 14 makes one revolution at a non-constant speed, so that the traverse mechanism 20 is connected to the output side gear 10B connected to the second disc 14. The rotational speed at the time of outputting the rotational driving force to the motor is not constant. As a result, the moving speed of the traverse belts 21 and 22, that is, the traverse speed increases and decreases in a constant cycle.

Transmission mechanism 10 using staggered shaft
Is that one rotation is one cycle of the shift. On the other hand, when forming a cone-wound package, it is necessary to increase the traverse speed in the small diameter portion and to decrease the traverse speed in the large diameter portion. Therefore, the input / output gears 10A, 1A of the transmission mechanism 10
For one revolution of 0B, the traverse of the yarn S is set to one reciprocation, and the traverse speed is set to be maximum at the minimum diameter portion of the cone wound package P and to be minimum at the maximum diameter portion of the package P. By doing so, a desired cone-wrapped package can be obtained.

[0028] When the dimension from the center of rotation r ₁ to pin 15 the center of the first disk 13 R, the first disk 13 the eccentricity of the second disc 14 is X, the gear ratio is (R +
X) / (R−X). In a normal cone winding, the gear ratio is set to about 1.3, but by changing the value of the eccentric amount X arbitrarily, the gear ratio is changed in a stepless manner, and the cone winding in a desired form according to various specifications is changed. It is possible to form a package. If the gear ratio can be set to 1,
Formation of a cheese roll package is also possible.

To change the gear ratio, the input gear 10A and the first disk 13 are fixed, and the output gear 10B and the second disk 14 are moved in a direction perpendicular to the rotation axis to increase or decrease the eccentric amount X. This is possible. In this case, as can be seen from FIGS.
As the position of B changes, the positions of the gear d for transmitting the rotational driving force to the traverse mechanism 20 and the output pulley 17 also need to be changed. Therefore, a tension pulley 35 (see FIG. 4) is provided for the timing belt 23,
This adjusts the belt tension.

As described above, when the traverse device T is used as the yarn winding device, the following adjustment operations are required.

Adjustment of the thread transfer position between traverse guides provided on the traverse belt. Normally, the upper and lower traverse guides are set so as to overlap at both left and right ends of the traverse belt. Adjustment of the transfer timing between the traverse guides and the speed change cycle in the speed change mechanism. That is, the traverse speed of the yarn is set to be the maximum at the minimum diameter portion of the package, and the traverse speed is set to be the minimum at the maximum diameter portion. The position of the drum is set so as to engage with the groove. In order to facilitate each of the adjustment operations, the following configurations a to e are employed in the present embodiment.

(A) The traverse mechanism 20 is unitized and can be taken out of the traverse device T. (b) The gear f of the traverse mechanism 20 can be detachably attached and the gear f can be detached from the outside. (C) The driving force is transmitted from the speed change mechanism 10 to the traverse mechanism 2
The timing belt 23 for transmitting to the transmission belt 0 is formed separately from the drive belts of the traverse belts 21 and 22. (d) The gear d that meshes with the output gear 10B of the transmission mechanism 10 is made detachable and from the outside. (E) A taper lock mechanism is employed so that the drum can be fixed at an arbitrary rotation position. The adjustment of the delivery position is performed as follows.
The traverse mechanism 20 is removed from the traverse device T, and the gear f is removed. Traverse belts 21 and 22 and timing belts 24 and 25 spanned between pulleys
A required tension is applied to each of the tension pulleys 36 to 39 (see FIG. 4), and each traverse guide 40, 40 is adjusted so as to vertically overlap at one end of the traverse belts 21, 22. If this state is held by an appropriate jig and the gear f is attached and meshed with the gear e, the transfer position of the yarn S between the traverse guides 40 is fixed in an appropriate state. Gear e
It is also possible to perform the above-mentioned work by making it detachable.

The above-mentioned timing adjustment work is performed as follows. The output gear 1 of the transmission mechanism 10
The gear d that meshes with 0B is removed. Then, after properly adjusting the yarn transfer position based on the above procedure,
In this state, the traverse mechanism section 20, which is appropriately fixed with a jig, is attached to a predetermined position, and the timing belt 23 is stretched between the traverse mechanism section 10 and the transmission mechanism section 10, and the tension pulley 3
At 5 (see FIG. 4), a required tension is applied. On the other hand, with respect to the transmission mechanism 10, the positional relationship between the input gear 10A and the output gear 10B is adjusted so that the gear change state matches the adjusted traverse guide position (that is, the rotation speed is maximized or minimized). adjust. At this time, if the marking indicating the position where the rotation speed of the output side gear 10B is maximum (or minimum) is provided on a frame or the like that supports the transmission mechanism 10, the adjustment operation is very simple. Thereafter, the gear d is mounted and the transmission mechanism 1 is mounted.
When the output gear 10B is engaged with the output gear 10B, the state in which the yarn delivery timing and the traverse speed shift state are properly adjusted is fixed.

As described above, after the adjustment of the yarn transfer position and the adjustment of the transfer timing and the shift state as described above, the traverse guide is held at the yarn transfer position by a jig as appropriate. Then, the position of the drum 6 is adjusted and fixed so as to match the holding state. As shown in FIGS. 2 and 3, the drum 6 of the present example is configured so that it can be fixed at an arbitrary angle (phase) with respect to the rotating shaft 6 a by a fixing member 8 using a taper disposed at an end. I have.

As shown in FIG. 3, the fixing member 8 includes first taper members 8a and 8a that contact the outer peripheral surface of the rotating shaft 6a, second taper members 8b and 8b that contact the inner peripheral surface of the drum 6, and
And bolts 8c, 8c, and each member is a pair of two members arranged symmetrically with respect to the rotation shaft 6a. Also,
The first tapered member 8a has a through hole 8d through which the bolt 8c can be inserted, and the second tapered member 8a has a screw hole 8e into which the bolt 8c can be screwed. Bolt 8
c into the through hole 8d of the first tapered member 8a,
The second tapered member 8b is attracted to the first tapered member 8a by being screwed into the screw hole 8e of the tapered member 8b and tightened. As a result, the two tapered members 8a and 8b come into contact with each other and slide on the inclined surfaces, and the first tapered member 8a is pressed against the outer peripheral surface of the rotating shaft 6a and the second tapered member 8b is pressed against the inner peripheral surface of the drum 6. As a result, the drum 6 and the rotating shaft 6a are fixed so as to be able to rotate integrally.

As described above, in the present embodiment, the fixing member 8 allows the drum 6 to be fixed at an arbitrary angle (phase) with respect to the rotating shaft 6a. Therefore,
If a marking indicating the proper position of the drum 6 at the time of delivery of the yarn S is provided on a frame or the like supporting the drum 6, the operation of adjusting the position of the drum 6 can be performed extremely easily. By properly setting the engagement state with the guide groove 7 at the time of delivery of the strip S, it is possible to reliably prevent twill drop.

Next, application examples of the present invention will be described.
FIG. 6 shows the entire configuration of an automatic winder 50 incorporating the belt traverse device T according to the present invention,
FIG. 7 shows the main part. The illustrated automatic winder 50 unwinds the yarn S from the yarn supply package 60 and winds the yarn S around the tapered paper tube Q detachably held by the uppermost cradle 51 to form a cone-wound package. It is for.

In this embodiment, the drum 6 of the belt traverse device T for applying a rotational driving force to the paper tube Q and the yarn S
And a traverse mechanism 20 (see FIG. 7) which traverses the frame 59 of the winder 50.
The transmission mechanism 10 and mechanical elements for transmitting the rotational driving force of the motor 2 to the transmission mechanism 10, that is, the belt 4, the pulley 5, and the gears a, b, and c include a frame. 59.

The operation of the automatic winder 50 will be described. During normal winding of the yarn, the yarn S unwound from the yarn supply package 60 is made to follow the guide 57 and then driven to rotate by the drum 6. Rewind the tapered paper tube Q. At this time, the yarn S is traversed right and left by the traverse device T while increasing and decreasing the speed at a constant period optimal for forming the cone wound package. During the winding operation, the yarn defect detector 53 monitors the presence or absence of a yarn defect in the yarn S, and the tensor 56 adjusts the tension of the yarn S.

When the yarn defect detector 53 detects any defect or abnormality in the yarn S, the yarn
Is stopped, and the yarn S is cut by a cutter provided in the yarn defect detector 53. The yarn supplying side portion (lower yarn) of the cut yarn S is sucked by the lower yarn suction port 55 which is constantly sucking. On the other hand, the winding side portion (upper yarn) of the cut yarn S is wound up by the drum 6 that rotates by inertia. Subsequently, the drum 6 is rotated in the reverse direction to feed out the yarn S a little, and at the same time, the upper yarn suction member 58 is swung upward to capture the upper yarn, and then swiveled downward again to transfer the captured upper yarn to the yarn joining device 52. Lead. On the other hand, the lower thread suction member 54 is turned downward to catch the lower thread sucked into the lower thread suction port 55, and then is turned upward again to guide the captured lower thread to the yarn joining device 52. The upper yarn and the lower yarn guided to the yarn joining device 52 in this manner are connected by the swirling air flow in the yarn joining device 52. When the yarn joining process is completed,
Is started in the forward direction (winding direction), and the winding process of the yarn S is restarted.

The embodiments of the present invention are not limited to those described above. For example, in the traverse mechanism 20, an even number of gears may be interposed between the gears e and f without directly engaging the gears e and f, and the interposed gears may be configured to be removable. Similarly, the transmission mechanism 1
Regarding the output side gear 10B and the gear d at 0, a removable gear may be interposed between the two. In addition, the present invention does not prevent an appropriate change according to a situation.

[0042]

The belt traverse device according to the present invention has the following features.
In a state where each belt of the traverse mechanism is stretched, the transfer position of the thread between the traverse guides is appropriately adjusted, and then the gear is mounted to fix the above-described proper transfer position. Therefore, the operation of adjusting the delivery position of the yarn is very simple.

By making the gear for transmitting the driving force from the transmission mechanism to the traverse mechanism detachable, the position of the yarn transfer in the traverse mechanism is adjusted, and then the speed change state of the transmission mechanism is changed. After the adjustment is made so as to match the adjusted traverse guide position, the gear can be mounted to fix the adjustment state. Therefore, the operation of adjusting the change in the traverse speed of the yarn to be appropriate becomes extremely easy.

Since the traverse mechanism is unitized and detachable from the traverse device, and the traverse mechanism can be mounted after the adjustment work is completed, the time for stopping the device for maintenance can be reduced. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment in which a belt traverse device according to the present invention is applied to a yarn winding device.

FIG. 2 is a front view showing a schematic configuration of an embodiment of a belt traverse device according to the present invention.

3A and 3B show a fixing structure of a drum in an embodiment of the belt traverse device according to the present invention, wherein FIG. 3A is a front sectional view of a main part, and FIG. −
It is a side sectional view in the B line.

FIG. 4 is a plan view showing a schematic configuration of a traverse mechanism in one embodiment of the belt traverse device according to the present invention.

FIG. 5 shows a schematic configuration of a speed change mechanism in an embodiment of the belt traverse device according to the present invention,
(A) is a partial cross-sectional front view, and (B) is a side view of a main part.

FIG. 6 is a perspective view showing an automatic winder incorporating the belt traverse device according to the present invention.

FIG. 7 is a perspective view showing a removable portion of the belt traverse device according to the present invention.

[Explanation of symbols]

2 Motor 3 Pulley 4 Belt 5 Pulley 6 Friction Drum 7 Guide Groove 10 Transmission Mechanism 10A Input Gear 10B Output Gear 11 Rotary Shaft 12 Rotary Shaft 13 First Disk 14 Second Disk 15 Pin 16 Slot 16 Output Pulley 20 Traverse Mechanism 21, 22
Traverse belt 23-25 Timing belt 26-34
Pulley 35-39 Tension pulley 40 Traverse guide 41, 42 Boss 50 Automatic winder A Winding device P Package Q Paper tube R Rotation radius of first disk r ₁ Rotation center of first disk r ₂ Rotation center of second disk S Thread Article T Belt traverse device X Eccentricity a to f Gear

Claims (4)

[Claims] 1. A belt traverse device comprising: a speed change mechanism for receiving a driving force from a drive source such as a motor; and a traverse mechanism connected to the speed change mechanism and having a set of traverse belts having different moving directions. Any one of a plurality of gears provided on a path for transmitting a driving force from the drive source to the traverse belt of the traverse mechanism via the transmission mechanism is attachable after the completion of the adjustment work. A belt traverse device. 2. A plurality of input pulleys for providing a driving force to one of a pair of traverse belts having different moving directions and another input pulley for providing a driving force to the other traverse belt are operatively connected to each other. The belt traverse device according to claim 1, wherein at least one of the gears is attachable after completion of the operation of adjusting the yarn transfer position. 3. The belt traverse device according to claim 1, wherein a gear for transmitting a driving force from the speed change mechanism to the traverse mechanism is attachable after completion of a timing adjustment operation. 4. The belt traverse device according to claim 1, wherein said traverse mechanism is detachable, and is connectable to a speed change mechanism after the timing adjustment operation is completed.